WO2010081009A2 - Systems, apparatus and methods for making an electrical connection to a robot and electrical end effector thereof - Google Patents
Systems, apparatus and methods for making an electrical connection to a robot and electrical end effector thereof Download PDFInfo
- Publication number
- WO2010081009A2 WO2010081009A2 PCT/US2010/020510 US2010020510W WO2010081009A2 WO 2010081009 A2 WO2010081009 A2 WO 2010081009A2 US 2010020510 W US2010020510 W US 2010020510W WO 2010081009 A2 WO2010081009 A2 WO 2010081009A2
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- WO
- WIPO (PCT)
- Prior art keywords
- electrical
- end effector
- robot
- contacts
- power
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0025—Means for supplying energy to the end effector
- B25J19/0029—Means for supplying energy to the end effector arranged within the different robot elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/67742—Mechanical parts of transfer devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J11/00—Manipulators not otherwise provided for
- B25J11/0095—Manipulators transporting wafers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/02—Programme-controlled manipulators characterised by movement of the arms, e.g. cartesian coordinate type
- B25J9/04—Programme-controlled manipulators characterised by movement of the arms, e.g. cartesian coordinate type by rotating at least one arm, excluding the head movement itself, e.g. cylindrical coordinate type or polar coordinate type
- B25J9/041—Cylindrical coordinate type
- B25J9/042—Cylindrical coordinate type comprising an articulated arm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6831—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using electrostatic chucks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68707—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a robot blade, or gripped by a gripper for conveyance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20207—Multiple controlling elements for single controlled element
- Y10T74/20305—Robotic arm
- Y10T74/20311—Robotic arm including power cable or connector
Definitions
- the present invention relates to electronic device manufacturing, and more specifically to systems, apparatus and methods for transporting substrates.
- Conventional electronic device manufacturing systems may include multiple process chambers and load lock chambers. Such chambers may be included in cluster tools, for example. These systems and tools may employ robots to move substrates (silicon wafers, glass plates, etc.) between the various process chambers and load locks (e.g., process chamber to process chamber, load lock chamber to process chamber, and process chamber to load lock chamber) . Efficient and precise transport of substrates between the various system chamber components may be important to system throughput, thereby lowering overall operating costs. Accordingly, systems, apparatus and methods for efficient and precise movement of the substrates are desired .
- a robotic system which includes a vacuum chamber, a robot apparatus adapted to transport substrates within the vacuum chamber, the robot apparatus including a plurality of arms adapted to be rotated within the vacuum chamber, an electrical end effector attached to at least one of the plurality of arms, and an electrical coupling adapted to provide electrical power to the electrical end effector in the vacuum chamber.
- a substrate transporting robot apparatus adapted to move substrates within an electronic device processing system, which includes a robot including at least one moveable arm and an electrical end effector attached to the at least one arm, and an electrical coupling adapted to provide electrical energy from a power source to the electrical end effector.
- a substrate transporting robot apparatus which is adapted to move substrates within an electronic device processing system.
- the apparatus includes a robot including moveable arms and an electrical end effector attached to one of the arms, and electrical leads coupled to the electrical end effector, which pass through rotational joints of the moveable arms.
- a method of moving a substrate within an electronic device processing tool includes providing a robot within a vacuum chamber, the robot including an electrical end effector, and supplying electrical energy to electrical leads coupled to the electrical end effector by passing the electrical energy through engaging contacts.
- FIG. 1 is a schematic top view of a substrate transport system according to embodiments of the present invention .
- FIG. 2A is a schematic partially cross sectioned side view of a substrate transport system according to embodiments of the present invention.
- FIG. 2B is an enlarged schematic cross-sectional side view of a portion of a substrate transport system of FIG. 2A according to embodiments of the present invention.
- FIG. 2C is a schematic cross-sectional side view of a portion of a substrate transport system according to additional embodiments of the present invention.
- FIG. 2D is a schematic cross-sectional side view of a portion of a substrate transport system according to additional embodiments of the present invention.
- FIG. 2E is an enlarged schematic cross-sectional side view of a portion of a substrate transport system of FIG. 2D shown with the contact engaged.
- FIG. 2F is a schematic diagram of a substrate transport system according to additional embodiments of the present invention.
- FIG. 2G is a schematic diagram of a substrate transport system according to additional embodiments of the present invention.
- FIG. 2H is a circuit diagram of a substrate transport system according to additional embodiments of the present invention .
- FIG. 3A is a top perspective view of a robot apparatus according to embodiments of the present invention.
- FIG. 3B is an end perspective view of the robot of FIG. 3A according to embodiments of the present invention.
- FIG. 3C is a bottom perspective view of the robot of FIG. 3A according to embodiments of the present invention.
- FIG. 4 is a perspective view of a dual robot apparatus according to embodiments of the present invention.
- FIG. 5 is a partial perspective view of electrical leads passing along an upper arm of the robot apparatus of FIG. 3A according to embodiments of the present invention.
- FIG. 6 is a partial perspective top view of the electrical leads passing through openings in an upper arm of the robot apparatus of FIG. 3A according to embodiments the present invention.
- FIG. 7A is a partial perspective underside view of the electrical leads passing along the upper arm according to embodiments of the present invention.
- FIG. 7B is a partial perspective underside view of the electrical leads of FIG. 7A being clamped by a member according to embodiments of the present invention.
- FIG. 8 is a partial cross-sectional view of an elbow joint of the robot apparatus of FIG. 3A according to embodiments of the present invention.
- FIGs. 9A and 9B are partial perspective views of portions of the robot apparatus of FIG. 3A illustrating a positioning member according to embodiments of the present invention .
- FIG. 10 is a partial perspective view of a portion of the robot apparatus of FIG. 3A illustrating a clamping member securing the electrical leads to a positioning member according to embodiments of the present invention.
- FIG. 11 is a partial perspective view of an outboard portion of the robot apparatus of FIG. 3A illustrating the electrical leads extending along a forearm according to embodiments of the present invention.
- FIG. 12 is a partial perspective view of an outboard portion of the robot apparatus of FIG. 3A illustrating a clamping member securing the electrical leads to a forearm according to embodiments of the present invention.
- FIG. 13 is a flowchart depicting a method of operating a robot apparatus according to embodiments of the present invention .
- FIG. 14 is a schematic cross-sectional side view of a portion of a substrate transport system according to additional embodiments of the present invention.
- FIG. 15 is a schematic diagram of a substrate transport system according to additional embodiments of the present invention .
- FIG. 16 is a schematic circuit diagram of a substrate transport system according to additional embodiments of the present invention.
- FIG. 17 is a flowchart depicting a method of operating a robot apparatus according to embodiments of the present invention.
- the electrical end effector may include electrical power to electrodes (e.g., plates) which when appropriately powered will provide an electrostatic charge generation capability.
- the electrostatic charge when provided at the end effector, may attract and pull the substrate to the end effector with an electrostatic attraction force.
- the electrostatic force on the substrate may be of a sufficient magnitude so that the end effector and attached substrate may be moved at a relatively high rate of speed in a lateral direction (in an X-Y plane - see FIG. 1) without slippage of the substrate on the end effector.
- such electrostatic end effectors may include electrical circuit connections to a power source, and a control system to provide power to produce the electrostatic attraction forces in the end effector and control the relative amount of the electrostatic charge.
- a control system to provide power to produce the electrostatic attraction forces in the end effector and control the relative amount of the electrostatic charge.
- electrical connections may be desired, which connect to the electrical end effector and which may enable bridging a vacuum chamber wall.
- electrical connections which may survive the significant repetitive motions of the robot arms, are also desired such that service intervals may be maximized.
- a robot may be desirable for a robot to rotate greater than 360 degrees in the same rotational direction; in which case any fixed connection wires or other conductors between the electrical end effector and the power source would be twisted and possibly broken.
- the present invention provides a solution to this problem.
- the present invention in one aspect, is directed at providing an electrical feed through apparatus for bridging the vacuum chamber wall interface to provide electrical power inside the vacuum chamber to the electrical end effector.
- the present invention is directed to an apparatus for providing an electrical connection through the various relatively moveable robot arms of the robot.
- the connections may be oriented and configured such that fatigue and/or wear of the electrical circuit may be minimized.
- the connections may be oriented and configured such that particle generation is minimized.
- the invention is directed at a substrate processing system including a robot apparatus having an electrostatic end effector included within a transfer chamber and further including an electrical coupling adapted to provide power to the electrostatic end effector.
- the invention may provide electrical power coupling to an electrical end effector while limiting frictional drag from slip rings or other electrical rotary couplings.
- electrical coupling may be selectively engageable .
- This selectively engageable feature may include engaging an electrical connection for providing electrical energy to the electrical end effector prior to starting a robot motion profile, and then utilizing a brief time within the time needed to accomplish the robot motion profile to disengage the electrical connection.
- the electrical connection may be disconnected momentarily at one or more locations within the motion profile of the robot. The disengagement may allow for the electrical wires connected from the power source to the end effector to release any built up stresses or twisting, which may have resulted from carrying out the robot motion profile.
- the selectively engageable feature may allow for powering and/or charging of components, which supply electrical power to the electrostatic end effector, and then disengagement of the contacts so that the arms of the robot may be rotated with minimized frictional resistance.
- Capacitive embodiments are described where electrical power to the electrical end effector may be provided by a capacitive component or chargeable circuit even after the contacts are disengaged.
- Additional embodiments are directed to systems including an electrical coupling having inductively coupled coils.
- electrical power to the electrical end effector may be provided through inductively- coupled coils.
- the power may be used to provide power to power storage and charging circuit or used to power the electrostatic end effector directly. Further details of exemplary embodiments of the invention are described below with reference to FIGs. 1-17.
- the robotic transportation system 100 may include a vacuum transfer chamber 102 whose boundaries are shown dotted and one or more process chambers 104 and/or one or more load lock chambers 106 coupled to the transfer chamber 102 (each also shown dotted) .
- a robot 108 such as a conventional SCARA ("Selective Compliant Assembly Robot Arm”) , may be used to transport substrates between respective chambers 104, 106 (e.g., process chamber to process chamber, process chamber to load lock chamber, and vice versa) .
- a SCARA may include an upper arm 110 rotatable about a shoulder axis (shown at the intersection of the X and Y axes) , a forearm 112 rotatable about an elbow axis on an outboard end of the upper arm 110, and a wrist member 114 rotatable about a wrist member axis at an outboard end of the forearm 112.
- An electrical end effector 116 may be attached to the wrist member 114 by any suitable means such as bolts, screws or other mechanical fasteners.
- the electrical end effector 116 may be an electrostatic end effector and may include two or more electrodes 118A, 118B which, when provided with a suitable voltage potential applied to the electrodes 118A,
- Electrostatic end effectors are described in more detail in co-filed US Patent Application Serial Number 61/143,807 filed on January 11,
- the electrical end effector 116 may receive its power from a power source 122, which is controlled by an electrical end effector controller 124.
- the end effector controller 124 may turn on and off the power to the electrical end effector 116, such as an electrostatic end effector 116 at predetermined times when carrying out the motion profile of the robot 108.
- the robot controller 126 and end effector controller 124 may communicate the times when power is to be provided to the end effector 116, as well as when power to the end effector 116 is to be cut. Further, the controller 124 may engage a selectable ground such that an electrostatic charge in the electrical end effector 116 may be readily discharged, if desired.
- release of the electric charge may allow the substrate 120 to be readily put at a position, and not be dragged away when removing (retracting) the electrical end effector 116 from a process chamber 104 or load lock chamber 106.
- the robot controller 126 may be adapted to control the operation and orientation of the robot 108.
- the robot controller 126 is entirely conventional and will not be further described herein.
- the robot controller 126 may cause the upper arm 110 to rotate about a shoulder axis as shown by arrow 128 within an X-Y plane as defined by the X axis and Y axis shown in FIG. 1.
- the rotation may be clockwise (for retraction) or counterclockwise (for extension) through an angle of up to about a +/- 360 degree excursion.
- the forearm 112 may be adapted to rotate in a direction as shown by arrow 132.
- rotation of the forearm 112 may cause the wrist member 114 to rotate relative to the forearm 112 as shown by arrow 134.
- the electrical end effector 116 may translate relative to the base 130 along a translation axis connecting the shoulder axis of the upper arm 110 and the wrist axis of the wrist member 114, wherein the translation axis is designated as 136 which in this embodiment coincides with the Y axis. Accordingly, pure translation of the end effector 116, with no rotation, when accomplishing extension and retraction motions may be provided. Further, the substrate 120 may be moved from one process chamber 104 to another process chamber 104 or process chamber 104 to load lock chamber 106 or from load lock chamber 106 to process chamber 104 by the action of the robot 108 rotating the assembly of arms 110, 112, 114 along arrow 137.
- each of the process chambers 104 and load lock chambers 106 may be serviced by the robot 108 whereby substrates 120 may be picked from and put to the various chambers.
- the electrical end effector 116 is retracted from one chamber (e.g., 104) with a substrate 120 resting on the electrical end effector 116. Once retracted, the entire robot may be rotated about the base 130 along arrow 137. Thereafter, the robot arms 110, 112, 114 may be actuated to deliver the electrical end effector 116 and substrate 120 residing thereon to another chamber (e.g., 104 or 106) .
- Substrates 120 may be transferred to the load lock chambers 106 by a robot (not shown), which may be resident in a factory interface 138.
- the transfer of the substrates within the factory interface 138 may be from substrate carriers 140 docked at load ports 142, for example. Possible locations for substrates in the substrate carriers 140 and elsewhere in the load locks 106 and process chambers 104 are shown as dotted circles.
- FIG. 2A a schematic side view diagram of an exemplary embodiment of a substrate transportation system 100 of the present invention is shown.
- the robot 108 including upper arm 110, forearm 112 and wrist member 114 is shown in a fully-extended orientation servicing a process chamber 104 by inserting an electrical end effector 116 (the same as described within reference to FIG. 1) into the process chamber 104 such that the substrate 120 may be lifted off from the end effector 116 by lift pins or another suitable mechanism (not shown) .
- the put (placement of the substrate) within the chamber (104 or 106) may be accomplished by a z-axis functionality of the robot 108 whereby the robot 108 has the capability of lowering and raising the end effector 116 to accomplish a put or pick along the Z axis.
- the motion of the robot 108 is controlled via a robot controller 126.
- electrical leads 244 are provided passing through the upper arm 110, the forearm 112, and wrist member 114 to electrically connect with the electrodes 118A, 118B (FIG. 1) of the electrical end effector 116 mounted at the wrist member 114.
- a ground lead (not shown) may also be provided and pass along the same path as the electrical leads 244, 246. Details of the path of the electrical leads 244, 246 through the upper arm 110, forearm 112, and wrist member 114 are described with reference to FIGs. 2A-12 herein.
- an electrical coupling 250 is shown, which may be adapted to provide electrical power to the electrical end effector 116 located in the vacuum chamber 102.
- the coupling allows the bridging, i.e., coupling to the moveable components within the vacuum chamber 102.
- the electrical coupling 250 is best shown in enlarged partial view in FIG. 2B.
- the coupling 250 may include engaging contacts such as contact pairs 252, 254, which may be concentric annular rings of conductive material, for example. Other contact configurations may be used.
- An upper one of the first contact pair 252 may connect to the first electrical lead 244 while a lower one of the first contact pair 252 may be connected to the power source 122 by first power lead 256.
- an upper one of the second contact pair 254 may connect to the second electrical lead 246 while a lower one of the second contact pair 254 may be connected to the power source 122 by second power lead 258.
- the power leads 256, 258 may pass through a seal 259 which may be hermetically sealed and vacuum tight, as may the other leads 257A, 257B (to be described below) .
- the lower electrical contacts 252, 254 may be attached to a moveable support 260, which may be moveable, and may be suspended relative to a motor housing 262 by a suitable spring member 264.
- the upper contacts of 252 and 254 may be attached to an end of the shaft 265, such as the enlarged portion of the shaft shown.
- the spring member 264 may be of sufficiently low stiffness along a Z axis direction such that when an electromagnet 267 is supplied with suitable current by powering leads 257A, 257B, the electromagnet 267 is drawn to a permanent magnet 268 or, optionally, a ferromagnetic portion of the shaft 265, which causes the support 260 and the attached lower contacts 252, 254 to be moved upwardly in a Z direction so that the lower contacts of the contact pairs 252, 254 operatively engage and contact the upper contacts.
- the leads 256, 257A, 257B and 258 may all include strain relief loops to accommodate the axial displacement without overstraining the leads.
- suitable power may be provided to the electrodes 118A, 118B of the electrical end effector 116 by powering the power leads 256, 258 with the power source 122 to produce an electrostatic charge to attract a substrate 120 to the electrical end effector 116.
- the spring member 264 may be of low stiffness in a torsional direction about the Z axis. In this way, as the contact pairs 252, 254 are engaged, the robot 108 may be rotated by the action of the motive device 269 (having a rotor and stator, for example) to another location, such as to another process chamber 104.
- strain relief loops of leads 256, 257A, 257B and 258 may also be sufficient to accommodate a predefined amount of rotational displacement without overstraining the leads.
- a pilot 270 and recess 272 may be provided on the end of shaft 265 and the moveable support 260.
- One or more additional contact pairs may be utilized alongside the first and second contact pairs 252, 254 to provide other electrical connections to the robot 108.
- an additional contact pair (not shown) may be provided for a ground, which may be selectively switchable by the end effector controller 124.
- additional contact pairs may be provided if additional SCARA robots are added, such as in dual SCARA robots with dual end effectors.
- the electrical leads 244, 246, in accordance with another aspect may be part of an electrical circuit and may pass through the rotational axes of the plurality of arms of the robot 108, such as through a hole 274 passing through the shaft 265 of the shoulder axis Z, and then connect to the electrical end effector 116.
- the return of the lower electrical contacts of contact pairs 252, 254 may be accomplished without the use of a spring member 264 coupled to the moveable member 260.
- a plunger or other actuating means may be actuated to rotate the disengaged lower contacts to a neutral or "zero" position.
- FIG. 2C Another apparatus for providing electrical energy from the power source 122 to the electrical end effector 116 is shown in FIG. 2C. In this embodiment, momentary engagement of the contacts 252, 254 would electrically charge an appropriate capacitor member 275 with enough energy to hold the substrate 120 in place during a given robot motion profile.
- the contacts 252, 254 would then be disengaged by removing power from the electromagnet 267, and cutting power from the power source 122, which causes the moving member 260 to relax axially to a neutral position thereby separating the electrical end effector 116 from the power source 122.
- the stored energy in the capacitor member 275 then supplies the energy needed by the electrical end effector 116 to generate the electrostatic attractive force on the substrate 120.
- the contacts 252, 254 may be reengaged momentarily as dictated by the end effector controller 124 such as for a time sufficient to charge the capacitor member 275 and then the contacts 252, 254 may be disengaged.
- This engagement and disengagement may be done when the robot 108 comes to a stop, for example. In this way, the robot 108 does not need to overcome the torsional spring force resulting from windup of spring 264 to accomplish motion of the shaft 265, as in previously- described embodiments. In other words, as the moveable support 260 is disengaged, rotation of the shaft 265 via suitable control signals to the robot motors from the robot controller 126 may be accomplished with minimized resistance.
- the robot controller and the end effector controller 124 may communicate to determine when the charging of the capacitor member 275 may take place.
- the capacitor member 275 may include one or more capacitors of sufficient size to provide an electrostatic force to hold the substrate 120 to the electrical end effector 116.
- recharging may be accomplished during a moving portion of the motion profile by engaging the contacts 252, 254 and torsionally engaging the spring member 264.
- These methods may provide for transferring stored energy to the electrical end effector 116 while minimizing any rotational frictional drag and reliability of the mechanism may be improved.
- one or more contacts may be added to provide a ground path through the contacts such that the static electric charge built up on the end effector 116 may be drained (bled) at suitable times during the robot motion profile. For example, before a put operation, the static electric charge may be released through switching a selectively switchable ground. In this manner, the end effector controller 124 may cut power from the power source 122, but continue to supply power to the electromagnet 267 for a time sufficient to release the static charge through a selectively switchable ground.
- an actuator may function to actuate the moveable support 260.
- the moveable support 260 of the electrical coupling 250 may be restrained against rotational motion by a key or spline 280 located on a shaft 282 connected to the moveable support 260.
- Other suitable means for restricting rotation may be provided.
- a solenoid 284 including windings 286 and magnet 288 may be provided, which may selectively actuate the moveable support 260 by providing suitable power to the windings 286 from the power source 122, as dictated by the end effector controller 124. In this manner, the contacts 252, 254 may be engaged into physical contact upon actuation of the solenoid 284.
- the contacts 252, 254 may be physically disengaged by the solenoid 284 returning to a neutral position (as shown) upon cutting the power to the solenoid 284 and a chargeable component.
- the chargeable component e.g., one or more capacitors or a chargeable circuit
- a power storage and distribution circuit 290 is provided, and is electrically connected to the end effector 116 and the upper contacts of contacts 293H. As shown in FIG. 2E, the moveable support 260 is actuated by the solenoid 284 so that electrical contacts 252, 254 come into electrical contact.
- one or more capacitors in the power storage and charging circuit 290 may be charged.
- the actuation may occurs as the robot 108 is stopped momentarily, and such charging of the charging circuit 290 may take about a second or less, or even about 500 ms or less.
- Flexible seals 292 secured to the moveable support 260 or shaft 265, which may also be formed as annular elastomer rings, may seal the air space about each contact 252, 254 when engaged. This sealing function may minimize glow discharge, arc, corona and/or other electrical breakdowns as the charging takes place.
- the solenoid 284 may be actuated slightly before providing the high voltage to charge the power storage and charging circuit 290 to ensure a good seal takes place before charging.
- the electrical leads 256, 258 may be provided with strain relief loops to accommodate the axial motion of the moveable member 260 along the Z axis.
- the leads 258, 259 may pass through a hermetic seal 259 mounted in the motor housing 262, which may contain a motor chamber 263 provided under vacuum. In this manner the electrical coupling 250 of the present invention is adapted to provide electrical energy to the electrical end effector 116 which is positioned in the vacuum chamber 102 connected to the motor chamber 263.
- the motor chamber 263 and the vacuum chamber 102 may both be provided under a vacuum.
- Leads 289A, 289B may be provided to the coil 286 if solenoid and may be powered by the power source 122 as commanded by the end effector controller 124.
- the electrical coupling 250 provides a means for bridging the vacuum chamber wall and providing power to the end effector 116 without any sliding electrical contacts (e.g., slip rings), which may cause particle generation and parasitic frictional resistance.
- any suitable magnetic or mechanical device may be utilized to move the moveable member 260 so as to cause physical contact between the upper and lower electrical contacts 252, 254.
- various means for monitoring and determining whether the power storage and charging circuit 290 is appropriately charged may be provided.
- the moveable support 260 may be actuated by a solenoid or like translation-causing mechanism 284 under the control of end effector controller 124.
- the end effector controller 124 at predetermined times during the robot motion profile, causes the actuation of the solenoid 284 to cause the electrical contacts to contact and electrically engage.
- the contacts each representing two or more electrical paths, are provided as high voltage contacts 293H and low voltage contacts 293L.
- the high voltage contacts 293H and low voltage contacts 293L may be electrically connected to respective high and low voltage sources provided within the power source 122.
- respective high voltage capacitive array 294 and low voltage capacitive array 295 may be electrically charged.
- the moveable support 260 may be moved back to its neutral (non-contacting position) under the control of end effector controller 124 via power from the power source 122 being cut to the solenoid 284.
- the high voltage capacitive array 294 and the low voltage capacitor array 295 may provide power to the other components of the power storage and charging circuit 290 and to the electrical end effector 116.
- the high voltage capacitive array 294 is connected to a high voltage power switching connects and disconnects power to the electrical end effector 116.
- the high voltage power switching circuit 296 may contain suitable electronics and components to connect or disconnect the stored high voltage to the electrical end effector 116 and may also contain components to accomplish the regulation of the electrical current supplied to the electrical end effector 116.
- the low voltage capacitor array 295 when charged, provides power to a feedback circuit 297, and may provide power to the high voltage power switching circuit 296.
- the feedback circuit 297 may function to monitor the current and/or voltage potential supplied to the electrical end effector 116. If the supplied current and/or voltage potential is above a predefined amplitude, as determined by a discrimination circuit, then a light emitting diode (LED) 298 may be continuously illuminated. This indicates that proper chucking ability is present at the electrical end effector 116.
- a receiver 299 electrically connected to the end effector controller 124 may provide a signal to the controller 124 when light from the LED 298 is being received thereat.
- the end effector controller 124 may communicate with the robot controller 126 to cause the robot 108 to stop the robot 108 momentarily for a recharge, or slow down the motion of the robot 108 until the next opportunity for a recharge presents itself within the motion profile of the robot.
- the predefined value is set at a level, which would reduce the attractive force to the point where acceleration of the end effector 116 may cause the substrate 120 to not be properly positioned on, or to fall off from, the end effector 116 during transportation.
- the end effector controller 124 may cause the engagement of the solenoid 284 and cause the power source 122 to recharge the high voltage capacitive array 294 and the low voltage capacitor array 295.
- feedback mechanisms other than the LED/receiver system described may provide feedback concerning the status of the current and/or voltage supplied to the electrical end effector 116.
- the feedback may be provided by any suitable feedback mechanism, such as voltage to frequency converter circuitry, radio frequency communication or other wireless communication.
- the controllers 124 and 126 may be separate controllers or integrated into one common controller.
- FIG. 2G illustrates another embodiment of a transportation system 200A in accordance with aspects of the invention.
- the components are the same as in the previous embodiments, except that the power source 122A may be a 24 volt DC power supply, and the power storage and charging circuit 290A may be adapted to convert the 24 volt supply into a high voltage output to the electrical end effector 116.
- a moveable support 260 contains electrical contacts 293A, which may be engageable for passing current from the 24 volt power source 122A to a capacitive component 294A (e.g., a capacitor or capacitive array) .
- a capacitive component 294A e.g., a capacitor or capacitive array
- various other supply voltages could be used other than 24V to power a suitable DC/DC converter for electrostatic applications.
- a DC/DC converter 301 may function to convert the 24 volt supply to a high voltage supply (e.g., of about 500 V to 2,000 V) and supply high voltage to the high voltage power switching circuit 296A.
- Power to the switching circuit 296A may be provided by regulating the voltage from the capacitive array 294A via a voltage regulator 302.
- a low voltage power source may be provided through separate low voltage contacts to a low voltage capacitive array, similar to that shown in the FIG. 2F embodiment.
- power condition feedback may be provided.
- the feedback circuit 297 may illuminate a light source 298 (e.g., an LED) and the light signal 298A may be received by a light receiver 299 (e.g., a photo sensor) mounted on the moveable member 260 or otherwise mounted in the motor housing 262.
- the receiver 299 may be electrically coupled to the end effector controller 124 or the robot controller 126, or both, such that remedial measures (discussed above) may be taken upon determination of a low power condition, as indicated by no longer receiving the light signal 298A.
- FIG. 2H illustrates an electrical circuit diagram, which may be used to accomplish the functions described above.
- a power source 122 is provided, which couples a high voltage source to the respective contacts
- Capacitive component 294 may be a suitably-sized capacitor or array of capacitors, for example.
- Switching circuit 296 controls the power (voltage potential) provided to the positive (+) and negative (-) electrodes of the end effector 116 by either connecting the capacitive component 294 to the end effector electrodes or by disconnecting the capacitive component 294 from the electrodes. Kl relay in its relaxed state (un-energized) holds the relay contacts in the position that connects the capacitive component 294 to the electrodes of the end effector 116.
- Kl relay coil is energized, which forces the Kl relay contacts to disconnect the capacitive component 294 from the end effector electrodes.
- the Kl relay contacts then cause the end effector electrodes to be shorted together or at least be connected to each other through resistance such that any voltage potential between the electrodes are rapidly neutralized.
- a feedback circuit 297 may provide feedback information concerning the voltage level supplied to electrodes of the electrical end effector 116.
- An optical diode coupled to the feedback circuit 297 may be normally powered.
- a voltage supervisor 276 e.g., STM 1061
- the sinking output signal provided may disable the optical diode, for example.
- the light signal 298A may be shut off via cutting a current via a Mosfet.
- the lack of signal 298A may then be communicated via a signal from a wireless photo sensor receiver to the end effector controller 124, by providing a +V signal thereto. Accordingly, as a result of the low voltage feedback, additional charging may be provided as needed, or other remedial measures may be communicated to the robot controller 126 causing the robot to stop or slow down to prevent the substrate from falling from the end effector 116.
- FIGs. 3A-3C and FIGs. 5-12 illustrate another embodiment of a robot apparatus 300, which may include an upper arm 310 and a forearm 312 with the wrist member (not shown for clarity) .
- this embodiment is a dual-arm robot (both arms shown in FIG. 4), the path of the electrical leads 244, 246 will apply equally to both single and dual-arm robots.
- the dual-arm robot apparatus 408 in accordance with aspects of the invention may include a base 430 for mounting the robot in a chamber (e.g., a vacuum chamber), an outer shaft 431, first and second upper arms 410A, 410B at least one of which is coupled to the shaft 431, first and second forearms 412A, 412B coupled for rotation relative to the first and second upper arms 410A, 410B, and first and second wrist members 414A, 414B coupled for rotation relative to the forearms 412A, 412B. Electrical end effectors 416A, 416B are shown attached to the wrist members 414A, 414B.
- a chamber e.g., a vacuum chamber
- first and second upper arms 410A, 410B at least one of which is coupled to the shaft 431
- first and second forearms 412A, 412B coupled for rotation relative to the first and second upper arms 410A, 410B
- first and second wrist members 414A, 414B coupled for rotation
- the electrical end effectors 416A, 416B may be configured as electrostatic end effectors and may include at least one electrode pair 418A, 418B, and may include several electrode pairs, such as pairs 418C, 418D and pairs 418E, 418F, for example. Any number of electrode pairs may be utilized.
- the pairs 418A, 418B, etc. when suitably charged, are adapted to attract substrates (not shown) to the electrical end effectors 416A, 416B during transport.
- Electrical leads to be described more thoroughly below, pass through the shaft 431 and respective arms and wrist members and electrically connect to the electrodes of the electrical end effectors 416A, 416B via electrical leads 444D, 446C, for example.
- the electrical leads 344, 346 of the robot apparatus 300 are adapted to connect to a power supply, through an electrical coupling (see e.g., FIGS.2A-2G and FIG. 14) which passes the electrical power into robot arms and the vacuum chamber, and ultimately to the electrical end effector (not shown) .
- the electrical leads 344, 346 making up part of the electrical circuit may first pass through one of the shafts 365 (as best shown in FIG. 3C) to an upper surface of the upper arm 310 (as best shown in FIG. 3B) .
- the leads 344, 346 may then pass along a radial extent of the upper arm 310 through channels formed in the arm and extend radially outward towards the elbow axis 348 where the leads 344, 346 pass through openings 345 formed through the upper arm 310 (as best shown in FIG. 3A, 5 and 6) .
- the channels 347 formed in the upper arm 310 receive the electrical leads 344, 346.
- the channels 347 are slightly less deep than the diameter of the electrical leads 344, 346 such that when a clamping member 349 is secured in place by fasteners (not shown) the electrical leads 344, 346 will be slightly compressed and securely fastened in place. Accordingly, the wires may not move radially inward or outward during operation of the upper arm 310. Creep of the wire leads without the clamping member 349 may cause breakage and/or excessive wear of the electrical leads 344, 346. A suitable relief may be provided in the area passing through the shaft to accommodate any limited windup due to rotation of the upper arm 310.
- the clamping member 349 may include one or more plates or other members adapted to clamp the wire leads 344, 346 in place.
- the electrical leads 344, 346 may be copper or silver plated copper and may be sheathed in a suitable insulator, such as TEFLON® or KAPTON® both available from DuPont .
- a suitable insulator such as TEFLON® or KAPTON® both available from DuPont .
- the leads 344, 346 may pass through additional channels and then pass through joint opening 351 (see also FIG. 6) .
- the leads 344, 346 extend between the upper arm 310 and forearm 312 as best shown in a cross-sectional side view of FIG. 8 thereby extending through the elbow joint.
- the leads 344, 346 pass through a hole in the upper arm 310, through a hole in a bearing support 355, and through a hole in a wrist drive pulley 361, which is secured to the bearing support 355.
- the wrist pulley 361 attaches to the wrist member (not shown) via a metal drive belt (also not shown) which is connected at pins 357A.
- rotation of the forearm 312 via a metal drive belt (not shown) attached at pins 357 and interconnecting to a drive member at the shoulder axis (not shown) causes rotation of the positioning member 353, but does not cause rotation of the wrist drive pulley 361. Accordingly, any rotation or twisting of the electrical leads 344, 346 is accommodated in the opening 351. Smooth finishes and providing radiuses on any contact corner surfaces may minimize wear of the leads.
- a clamping member 349A or other suitable clamping mechanism may be attached to the arm 310 by fasteners (not shown) or other suitable means and may be adapted to clamp the electrical leads 344, 346 and hold them securely in place and prevent radial movement of the leads 344, 346 relative to the arm 310.
- the leads 344, 346 pass through the opening 351, the leads then extend along a radial length of the forearm 312 as best shown in FIGs. 9A, 9B.
- the leads 344, 346 pass along a positioning member 353, which is adapted to position the leads over an approximate center of the opening 351 (FIG. 8) .
- the positioning member 353 may include openings 345A proximate one end of the forearm 312 where the opening is located.
- the openings 345A may be laterally spaced apart so as to minimize any contact between the electrical leads 344, 346 as they extend through the opening 351.
- a suitable amount of strain relieving extra length of electrical lead may be provided as the electrical leads passes through the opening 351 to accommodate the rotation of the forearm 312 relative to the upper arm 310.
- the positioning member 353 may extend from the shaft towards the wrist member (not shown) provided on the other end of the forearm 312 and may connect to an upper portion of the forearm by fasteners (e.g., screws) or other suitable fastening means.
- the positioning member 353 may include channels formed therein for accepting the electrical leads 344, 346. As shown in FIG. 10, a clamping member 349B or other suitable clamping mechanism may be attached to the positioning member 353 by fasteners (not shown) or other suitable means and may be adapted to clamp the electrical leads 344, 346 and hold them securely in place and prevent radial movement of the electrical leads 344, 346 relative to the forearm 312.
- the leads 344, 346 continue extending along the radial extent of the arm 312 and then pass through a shaft extending between the wrist member (not shown) and the forearm 312.
- the forearm 312 may include channels formed on its outboard end for accepting the electrical leads 344, 346.
- a clamping member 349C or other suitable clamping mechanism may be attached to the forearm 312 at its outboard end by fasteners (not shown) or other suitable means and may be adapted to clamp the electrical leads 344, 346 and hold them securely in place and prevent radial movement of the electrical leads 344, 346 relative to the forearm 312.
- the electrical leads 344, 346 After passing through the passage formed through a shaft or pilot of the wrist member, the electrical leads 344, 346 connect to the electrodes of the electrical end effector 116.
- a method 1300 according to the present invention is provided in FIG. 13.
- a robot apparatus is provided within a vacuum chamber of an electronic device processing system, wherein the robot apparatus may include a plurality of robot arms and an electrical end effector attached to at least one of the robot arms.
- electrical power e.g., a current or voltage potential
- electrical power may be supplied to electrical leads of an electrical circuit coupled to the electrical end effector.
- electrical power may be supplied from outside of the vacuum, at least at certain times during the motion profile.
- the electrical current or voltage potential may be supplied via an electrical coupling, which may have engaging contacts, for example.
- the contacts may be engaged only at certain times during the motion profile and transport of the substrate such as by an actuator (e.g., an electromagnet or solenoid) ; such that from time to time, the electrical engagement of the contacts may be broken. At times when the coupling is disengaged, electrical power may still be provided to the electrical end effector 116 by a chargeable component or circuit (See FIGs. 2C-2H) . In other embodiments, such as the inductively coupled embodiments, the power may be provided to the end effector through inductively coupled coils (See FIGs. 14-17) .
- an actuator e.g., an electromagnet or solenoid
- the engaging contacts may move with a rotating shaft of the robot apparatus during substrate transporting events and may be disengaged during at least a short interval, such as when the robot apparatus stopped temporarily at a destination.
- the electrical contacts may experience substantially no relative sliding motion in torsion, thus particle generation is minimized. This may be provided by allowing at least one of the electrical contacts of a contact pair to be supported on a spring, such that the spring is rotationally wound up in torsion when the contacts are engaged and when the robot arm is rotating. However, the spring is allowed to relax to a neutral position when the circuit is broken intermittently, such as when stopping the robot at a destination.
- the power to the electromagnet may be cut temporarily and the spring may relax axially thus allowing the contacts to disengage.
- the electrical coupling allows the electrical current or voltage potential to be maintained to the electrical end effector so as to create an electrostatic charge at times during the transportation movement of the substrate, yet allows the electrical power to be cut during brief intervals to allow the contact to rotate with the spring back to a neutral torsion position and orientation.
- the contacts are engaged for only brief intervals during the motion profile of the robot such that a chargeable component (e.g., capacitor or array of capacitors) or a power storage and charging circuit may be charged.
- a chargeable component e.g., capacitor or array of capacitors
- the electrical coupling contacts may be disengaged and electrical power may be provided to the electrical end effector 116 based upon energy stored in the power storage and charging circuit.
- electrical power may be provided to the electrical end effector 116 during motion of the robot, and friction, as well as spring resistance, imparted to the robot may be minimized during the robot's motion via disengaging the contacts.
- this wireless power distribution also allows for a robot to rotate freely in the same rotation direction indefinitely without twisting wires and without the need to untwist wires.
- FIGs. 14 and 15 illustrate an alternative embodiment of a robotic system 1400, which is adapted to transport a substrate on an electrical end effector 116 (FIG. 1), which is attached to at least one arm, and preferably one of a plurality of arms (e.g., the wrist member 114) of a robot 108.
- the robotic system 1400 includes an electrical coupling 1450 adapted to provide electrical power to the electrical end effector 116, which may be operable within a vacuum chamber (e.g., 102) .
- the electrical coupling 1450 includes a primary coil 1452 and a secondary coil 1454, which are mounted in close proximity to one another and are inductively coupled upon energizing the primary coil 1452.
- the primary coil 1452 may be stationarily mounted relative to the motor housing 262, whereas the secondary coil 1454 may be mounted for rotation along with the shaft 265.
- the primary coil 1452 may be driven by a high voltage pulsed power source 122 to cause a pulsed current flow, such as a square wave current pulse, in the primary coil 1552.
- the pulsed power source 122 may be any suitable voltage source, such as an interlocked voltage source of about 500 V to 2,000 V, for example. Other voltage magnitudes may be used.
- the current flow in the primary coil 1452 induces a current flow in the secondary coil 1454.
- the flow of current may be effectively switched on and off by the end effector controller 124, which may turn on an off the power source 122 and suitable means for providing signal oscillation, for example, at desired times within the robot's motion profile.
- the electrical coupling 1450 doesn't require electrical contacts, as in the previous embodiment, that charging may occur at any time during the robot's motion profile, for example.
- the inductively coupled coils could directly power the end effector continuously or even without use of capacitors.
- the coil 1454 may be coupled to a power storage and distribution circuit 1455, which in turn provides regulated flow of current and/or voltage potential to the electrical end effector 116 through electrical leads 244, 246 which may pass through the respective arms 110, 112, 114 of the robot 108 (only a portion of which is shown for clarity) .
- the power storage and distribution circuit 1455 may include a rectifier circuit 1458, such as a bridge rectifier, which functions to provide full or partial- rectification of the alternating current induced in the secondary coil 1454 and converts the current into a direct current. It is possible to implement the invention without the rectification circuit. For example, using alternating current, an averaging affect can be achieved. Additionally, offset phases of alternating currents can be used to provide an average voltage to the end effector 116, suitable for the desired electrostatic force.
- the direct current mentioned above may charge an optional capacitive component 1460.
- the capacitive component 1460 may be a single capacitor or an array of capacitors arranged in electrical series or parallel with one another, for example.
- a capacitor or array of capacitors providing a capacitance of about 1600 ⁇ F may be employed and may provide suitable chucking power for the electrostatic end effector 116.
- Other sized capacitances may be used.
- Electrical power stored in the capacitive component 1460 may be provided to the electrical end effector 116 at appropriate times by a high voltage power switching circuit 1462.
- the high voltage power switching circuit 1462 may function to connect and disconnect power to the electrodes of the electrical end effector 116 at certain times during the motion profile of the robot 108. Further, the switching circuit 1462 may function to short the electrodes when de- chucking the substrate from the end effector 116, such as when conducting a put operation. This shorting of the electrodes causes a rapid dissipation of any electrostatic potential, resulting in rapid release of the substrate. In some embodiments, a state of the current and/or voltage potential provided to the electrical end effector 116 may be monitored, as was described above, and which is further described with reference to FIG. 16. In the present embodiment, an electrical signal designating an on/off (chuck/dechuck condition) may be provided to the high voltage power switching circuit 1462.
- a control signal may be output from the end effector controller 124 to an emitter 1565A, such as the wireless emitter (e.g., a photo emitter (LED)) .
- the wireless signal 1565B (e.g., light signal) may be received at a wireless receiver 1565C (e.g., a photo sensor) arranged and positioned to receive the transmitted signal (e.g., light signal) .
- the signal received by the wireless receiver 1465C may be sent to the switching circuit 1462 to cut power to, and/or short the electrodes of the electrical end effector 116. Any suitable wireless communication may be used, such as diodes and photo sensors.
- the communication may be a two-way, where wireless signals 1665, 1667 may be provided from emitters to receivers to control the switching circuit so as to short the electrodes and/or to cut power to the end effector 116 (in the case where a capacitive component 1660 is included) .
- wireless signals 1665, 1667 may be provided from emitters to receivers to control the switching circuit so as to short the electrodes and/or to cut power to the end effector 116 (in the case where a capacitive component 1660 is included) .
- Another example of two way communication is for one signal to provide a chuck or de-chuck signal, which actuates or de- actuates respectively, the high voltage relay in the power storage and distribution circuit 1662.
- the other wireless signal may be used to monitor the voltage level on the secondary coil side and send a corresponding signal back to the end effector controller 124.
- second low voltage coils 1650L may be used to provide a low voltage source to power the various electrical components.
- the low voltage coils 1650L may be nested (co-axial) inside of our outside of the high voltage coils 1650H.
- FIG. 16 illustrates an electrical circuit diagram, which may be used to accomplish the functions described above.
- a power source 122 is provided, which couples high and low voltage sources 122H, 122L to the respective high and low voltage primary and secondary coils of the electrical couplings 1650L, 1650H. Power is transferred between the coils by inductive coupling.
- Rectifier circuits 1658L, 1658H may rectify the AC current supplied to DC. The direct current may then be stored as electrical energy in capacitive components 1660L, 1660H.
- Capacitive components 1660L, 1660H may be a suitably-sized capacitor or array of capacitors.
- Switching circuit 1662 controls the power (voltage potential) provided to the positive (+) and negative (-) electrodes of the end effector 116, by switching relay Kl from a grounded condition on normally-closed switches to a powered condition.
- the grounded condition normally closed
- a feedback circuit 1664 may provide feedback information concerning the voltage level supplied to electrodes of the electrical end effector 116.
- An optical diode coupled to the feedback circuit 1664 may be normally powered.
- a voltage supervisor 1668 e.g., STM 1061 may sink its output voltage when the high voltage to the end effector 116, as monitored by the circuit 1664, falls below a predetermined threshold set by a voltage divider 1670.
- the sinking output of the voltage regulator turns off the N- channel mosfet shown in 1664, thus disabling or at least partially disabling current flow through the LED emitter 1667. This extinguishes the LED 1667.
- the lack of signal 1667 may then be communicated via a signal from a wireless photo sensor receiver to the controller 124.
- a pull-up resistor coupled between the anode of 1667 and V+ will cause the signal to the end effector controller 124 to be pulled up to V+ level when LED 1667 is extinguished.
- additional charging may be provided as needed, or other remedial measures may be communicated to the robot controller 126 causing the robot 108 to stop or slow down to prevent the substrate from falling from the end effector 116.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
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Abstract
Description
Claims
Priority Applications (3)
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CN2010800126847A CN102349146B (en) | 2009-01-11 | 2010-01-08 | Systems, apparatus and methods for making an electrical connection to a robot and electrical end effector thereof |
JP2011545461A JP5501375B2 (en) | 2009-01-11 | 2010-01-08 | System, apparatus, and method for electrically connecting to robot and electrical end effector of robot |
KR1020117018651A KR101287000B1 (en) | 2009-01-11 | 2010-01-08 | Systems, apparatus and methods for making an electrical connection to a robot and electrical end effector thereof |
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US14380909P | 2009-01-11 | 2009-01-11 | |
US61/143,809 | 2009-01-11 |
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JP (1) | JP5501375B2 (en) |
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TW (1) | TWI405649B (en) |
WO (1) | WO2010081009A2 (en) |
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Also Published As
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US20120321434A1 (en) | 2012-12-20 |
TW201032971A (en) | 2010-09-16 |
KR20110104991A (en) | 2011-09-23 |
JP5501375B2 (en) | 2014-05-21 |
KR101287000B1 (en) | 2013-07-23 |
CN102349146B (en) | 2013-09-18 |
US8264187B2 (en) | 2012-09-11 |
US8692500B2 (en) | 2014-04-08 |
JP2012514544A (en) | 2012-06-28 |
WO2010081009A3 (en) | 2010-10-14 |
US20100178135A1 (en) | 2010-07-15 |
TWI405649B (en) | 2013-08-21 |
CN102349146A (en) | 2012-02-08 |
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